JPS62191683A - Reciprocative gas compressor - Google Patents

Abstract

PURPOSE:To reduce the power consumption and make a gas receiver with small capacity by decreasing/increasing the revolving speed of a compressor drive motor in accordance with rise/fall of the pressure etc. of compression gas at the outlet from gas receiver. CONSTITUTION:A reciprocative gas compressor 10 is driven by a motor 11, and the compression gas discharged from the compressor 10 is accumulated in a gas receiver 20. The gas pressure at the outlet from gas receiver 20 or the rate of gas flow increases or decreases according to the amount of use of the compression gas from the gas receiver 20. Here increase/decrease of the gas pressure or the rate of gas flow is sensed by a pressure transducer 30 or a rate-of-flow transducer 40, and the signal emitted is fed into a conversion adjuster 50. At this conversion adjuster 50, a command is given so that the abovementioned motor 11 rotates in full operation when the gas pressure at the outlet from the receiver 20, for ex., becomes lower than a certain specified value, and the revolving speed shall sink gradually down to the half with rise of the gas pressure above the specified value.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention makes it possible to control the gas pressure (or gas ff1i) of compressed gas at the outlet of a gas receiver by changing the rotation speed of a compressor drive motor. Relating to a reciprocating gas compressor.

Conventional technology and problems to be solved by the invention Conventionally, when using gas compressed by a reciprocating Ur gas compressor, when the gas consumption decreases and the gas discharge pressure increases, the compressor automatically discharges the gas. Unloaders have been used that can adjust the volume and maintain the gas pressure in the receiver at a predetermined pressure. However, when using an unloader,
Since the rotation speed of the compressor drive motor is constant, a considerable amount of power has to be consumed even when there is no load. On top of that,
It has a major drawback, such as the vibration of the compressor becomes intense when the unloader is used.

The present invention reduces (reduces) the rotation speed of the compressor drive motor in response to an increase (decrease) in the gas pressure of the compressed gas at the gas receiver outlet.
increase) or increase the compressed gas flow rate at the gas receiver outlet (
Erase! By making it possible to reduce (increase) the rotation speed of the compressor drive motor in accordance with the decrease (increase) in ff1), it is possible to efficiently reduce power consumption, reduce the tank capacity of the gas receiver, and prevent vibration. The present invention provides a reciprocating gas compressor that can extend the life of parts.

Means for solving the problem, namely, the reciprocating gas compressor of the present invention, as shown in the first section, generates a gas signal proportional to the gas pressure (or gas flow m) at the outlet of the gas receiver 20. Pressure (or flow rate) transmitter 30 (or 40) that continuously outputs and the transmitter 8
a conversion regulator 50 that receives an electrical signal of 0 and outputs an electrical signal corresponding to the required rotation speed; and the conversion regulator 50
The compressor drive motor 11 is provided with a control panel 60 that can control the rotation speed of the compressor drive motor 11 by receiving electrical signals from the compressor drive motor 11.

Example An embodiment of the present invention will be described below with reference to FIG.

10 is a reciprocating gas compressor driven by a four-wheeled motor (8tL4 induction motor) 11; 20 is a gas receiver that serves as a second compressor for the compressed gas discharged from the compressor; 80 is an outlet of the gas receiver 20; pressure colorator provided, 40
5 is a flow rate transmitter provided at the outlet of the gas receiver 20;
0 is a conversion regulator, 60 is a motor 1 by changing the number of voltage cycles.
This is a control panel equipped with a voltage type inverter 601 that changes the rotation speed of 0.

Operation and Effect of the Invention Therefore, depending on the amount of compressed gas used from the gas receiver 20, the gas pressure or gas flow rate at the outlet of the gas receiver 20 increases or decreases, but the increase or decrease can be adjusted by conversion from the pressure transmitter 30 or the flow rate transmitter 40. It is input as an electrical signal to the device 5°. In the conversion regulator 5o, as shown in FIG. 2, the gas pressure at the port of the receiver 200DtB is, for example, 6. r:rk
If the gas pressure becomes below the qlc layer, the control panel 60 is instructed to rotate the drive motor at 100%, but as the gas pressure increases from 6.5 kq/d to 7 to 9/cyA, the rotation speed decreases. Instruct the number to gradually decrease by 50%. As a result, as shown in FIG. 8, there is a linear proportional relationship between the drive motor rotational speed and the capacity of the receiver 20.
However, it can be done by satisfying the consumption of compressed gas. Next, as shown in FIG. 4, since the rotation speed changes depending on the load, the drive motor 11 can always be operated with high efficiency, and power consumption can be greatly reduced. As mentioned above, since the rotation speed can be reduced in accordance with the reduction in compressed gas consumption, the life of parts such as piston rings, bearing metals, intake and discharge valves, etc. can be extended, and vibrations can also be reduced. There are advantages to doing so.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing the principle of the present invention, the second factor is a graph showing the relationship between gas pressure and drive motor rotation speed, and Figure 8 is a graph showing the relationship between receiver capacity and drive motor rotation speed. , the fourth graph is a graph showing the relationship between power consumption and the rotation speed of the drive motor. 10...Reciprocating gas compressor 1]...Drive motor 20...Gas receiver 30...Pressure valve, signal 40...Flow rate transmitter 50...Conversion, 1. ', I node 60...control panel

Claims (1)

[Claims] Gas pressure (or gas flow rate) at the outlet of the gas receiver
A pressure (or flow rate) transmitter that continuously outputs an electrical signal proportional to 1. A reciprocating gas compressor, comprising: a control panel capable of controlling the rotational speed of a compressor drive motor by receiving electrical signals from the compressor.